I would assume your County Extension might have access to research which pre works best on typical soil types....I would suggest with their suggestion since they are the paying customer and have requested it. Besides that it is a good pre emergent IMHO, just make sure you have a quality chest spreader to accurately deliver it or your cost and application rate could be out of balance.

Thanks guys. I've never used bed pre before. I've always gone with good mulch layer and spot spray with gly at the mowing visit.

Our growing season is March-October. The ext office has used snapshot in the past and they must like it. They are requesting 3 apps a year, so I'm assuming that they are getting decent control over a 4 month period. I'm also guessing I need to bid it at the max rate of 4.6 lbs per 1000 and say that in my bid.